I tested the new glyphs last night and here's what we discovered:
Glyph of Wild Growth is HoT!
Glyph of Nourish is not.
GoWG is a must have, while GoN is only for MT healing.
You should consider getting Glyph of Swiftmend, Glyph of Rejuvenation, and Glyph of Wild Growth. You'll understand by the time you get to Mimiron.